my girlfriend has this iphone 6 and the wi-fi was working perfectly fine until it just randomly stopped but it says its connected but nothing is working?

Hello katyana96!

Please review the “Get More Help” section of the Related Article above your name:

Get more help

• If you're connected to a Wi-Fi network but you can’t get online, try to use your Wi-Fi network on other devices. If you can't get online using your other devices, there might be a service outage. Call your cable company or internet provider for help.
• Try connecting to a Wi-Fi network in a different location. If your device can connect, you need to get help with your Wi-Fi network. If your device can't connect to any Wi-Fi networks, contact Apple.
• Update your Wi-Fi router with the latest firmware and make sure that the router supports your Apple product. For more information, contact the router's manufacturer.

I hope this is helpful. Good Luck!